Tracking Late December Winter Storm Expected to Impact the Northern Plains through the Northeast U.S.

A winter storm system will rapidly intensify over the Midwest on Sunday and track through the Great Lakes on Monday. Periods of heavy snow are anticipated across the Upper Great Lakes late Sunday and continuing into Monday. At least 1/10 inch of ice accumulation is expected from a wintry mix across much of the interior Northeast U.S. starting Sunday afternoon. Read More >

Current conditions at

San Marcos, San Marcos Municipal Airport (KHYI)

Lat: 29.89°NLon: 97.86°WElev: 597ft.

Partly Cloudy

81°F

27°C

Humidity	57%
Wind Speed	S 16 mph
Barometer	29.88 in (1011.1 mb)
Dewpoint	64°F (18°C)
Visibility	10.00 mi
Heat Index	83°F (28°C)
Last update	27 Dec 3:56 pm CST

More Information:

Local Forecast Office More Local Wx 3 Day History Hourly Weather Forecast

Extended Forecast for

4 Miles SW San Marcos TX

Tonight
Low: 65 °F
Increasing
Clouds
Sunday
High: 78 °F
Decreasing
Clouds
Sunday Night
Low: 42 °F
Chance
Showers then
Mostly Cloudy
and Breezy
Monday
High: 51 °F
Partly Sunny
and Breezy
then Mostly
Cloudy
Monday Night
Low: 37 °F
Mostly Cloudy
Tuesday
High: 54 °F
Partly Sunny
Tuesday Night
Low: 35 °F
Partly Cloudy
Wednesday
High: 59 °F
Mostly Sunny
Wednesday Night
Low: 40 °F
Partly Cloudy

Detailed Forecast

Tonight

Increasing clouds, with a low around 65. South wind around 10 mph, with gusts as high as 20 mph.

Sunday

Cloudy, then gradually becoming mostly sunny, with a high near 78. South wind 5 to 10 mph, with gusts as high as 20 mph.

Sunday Night

A 30 percent chance of showers before midnight. Mostly cloudy, with a low around 42. Breezy, with a west southwest wind 5 to 10 mph becoming north 15 to 25 mph in the evening. Winds could gust as high as 40 mph.

Monday

Partly sunny, with a high near 51. Breezy, with a north wind 15 to 25 mph, with gusts as high as 40 mph.

Monday Night

Mostly cloudy, with a low around 37. North wind 10 to 15 mph, with gusts as high as 25 mph.

Tuesday

Partly sunny, with a high near 54. North wind 5 to 10 mph.

Tuesday Night

Partly cloudy, with a low around 35. Calm wind becoming west southwest around 5 mph.

Wednesday

Mostly sunny, with a high near 59. South southwest wind around 5 mph.

Wednesday Night

Partly cloudy, with a low around 40. South southwest wind around 5 mph.